DESIGN AND ANALYSIS OF ANALOG FILTERS A Signal ...

A Signal Processing Perspective 389
11.41
11.42
11.43
11.44
Implement a fourth-order Butterworth highpass filter with
Show the details of your calculations. Draw the final op amp circuit schematic
diagram indicating the values of all circuit elements. Using SPICE, plot the
magnitude frequency response of your circuit implementation. Also plot the
magnitude frequency response of each stage in your implementation.
Implement, using op amp circuits, a third-order elliptic highpass filter
with , and . Draw the final circuit
schematic diagram indicating all element values. Using SPICE, plot the
magnitude frequency response of your resultant circuit.
Go through the details of implementing, using op amp circuits, a fourth-order
Chebyshev Type II bandpass filter with the following specifications:
, and
. Draw the final circuit schematic diagram indicating all element
values. Using SPICE, plot the magnitude frequency response of your
resultant circuit. That is, carry out the details of Example 11.3.
Perform SPICE analysis on the circuit shown in Figure 11.16, asinProblem
11.43, confirming the results shown in Figure 11.17. In addition, plot the
magnitude frequency response of each of the two stages. For each stage,
record the magnitude of the peak gain and the frequency at which it occurs.
Perform an overlay plot with the overall magnitude gain for the circuit, and the
magnitude gain of each stage, allowing ready comparison of the three
frequency response plots.
11.45 Suppose it is desired to design and implement a Butterworth bandpass filter
with the following specifications:
(a)
(b)
(c)
(d)
and
Determine the minimum required order for the bandpass filter.
Using the minimum required order determined in part (a), determine
the actual value for that will be obtained, holding all other
specifications constant.
Determine the transfer function, with all values real and specified
except for an arbitrary gain constant, for the bandpass filter.
Draw the final active filter implementation schematic diagram, with the
order of cascaded stages with increasing Q, with all element values
indicated.
Section 11.4 Chapter 11 Problems